Shock absobbeb



1,469 915 1923' y D. BOUDEMAN, JR

SHOCK ABSORBER Filed Jan. 24. 1921 v 2 Sheets-Sheet 1 Elvwemtoz DFILLHS BOUDENAN JR.

when, A

Patented Oct. 9, 1923.

UINITVEDSTIATEVS PATENT OFFICE] I DALLAS BQUDEMAN, an, or KALAMAZOO, MICHIGAN.

Toall whom it mayconcem:

13s it known that I, DALLAS Bohemian, Jr., a citizen of the United States, residing at Kalamazoo, county of Kalamazoo, State which the following is a specification.

This invention relates t improvements --in shockfabsorbers V g The main objects of this invention are: i

F irst, to provide an improved shock, ab:

7 sorber by whichgthe rebound of the spring is cushioned or checked ac'cordingto the de- 1 gree or extent of the-compression of the 1 spring.

Second, to-provide an improved shock absorber which is' simple in structure'and' ma be quickly attached to vehicles in quite o mon use; Y

Further objects, and objectsrelating tostructural details, will definitely appear from the; detailed description to follow. a

I accomplish the objects ofmy invention,

:-"-by the devices and means described; in the following specification. The invention is.

clearly'defined and pointed out in the claims.-; i

structure which a preferred embodiement of my invention is clearly illustrated in the accompanying drawing, forming a .part ofthis specification, in which:

r popular make of automobile havingimy im; proved shock absorber'applied thereto, only' j such'parts of the vehicle being shown "as are deemed necessary to illustrate f an applica-' tion of .my improvements.

. -Fig..II,'s a vertical central section through the cylinder of my improved sh'ocksab and III.

Fig. V is a detailtransverse section on. a line corresponding to line 55 of Fig. II.

In the drawing similar reference characters refer to similar parts throughoutt-he several views, and the sectional views are takenlooking in the direction of the little arrows at the ends of the section lines.

Referring to the drawing, 1 represents the rear axle of a motor vehicle, 2 the rear cross member of the vehicle body and 3, the

Fig.7 I .'s arear elevation of 'parts of a SHOCK ABSORBER.

Application filed January 24, 1921. Serial No. 439,500; I

rear spring. which supported by the.

hangers 4 on the brackets 5. The parts illustrated are those of a popular pleasure 1 car. I

6 of Michigamhaveinvented certain new and uesful Improvements in Shock Absorbers, of

w-Iprovide a pairiof cy1inders'6: adapted to contain a fluid or are fluid-tight, the same being in practice preferably filled with a The piston 8 is connected by the connect ing rod 9 to an arm 10 on the rockIshaft 11.

This rock shaft has an actuating arm 12 on' itsouter end connected by the link 13 to the spring supporting bracket 5 on the running gear so that as the body oraxle moves rela tively through the flexing of the spring tithe piston is 'moved in the: cylinder. 7

As its outer end the cylinder isv provided with a chamber 14 separated from the pistonlchamber-by the partition15 having the 17 controlled bythe inlet :valve 18...

1 central cylinder relief r discharge port=l'6. V The cylinder is provided with an inlet port The chamber let. is connected to this'port by the passage'19 which also opens into the innerend of the cylinder beyond the stroke of-the piston.

The relief port" 16 -is provided with a valve 20 having an inwardly projecting stem 21' arranged; through the'guide 22 on the cross wpiece.23,-:the cross piecebeing arranged at the inner sidev of the partition 15. The valve 20 is held'to. its seat by. thespring 24, which is provided with-a tensioning screw '25. The cylinder 18' provided with sup.-

portingbracket-QG adapted to-be inserted in the channel-shaped cross piece 2 of tl'ievehi- .cle body and secured by the bolts 27;

Vi iththe parts thus arranged the shock absorbernot'only checks "the rebound but also supplements the spring 3 when the same is subjected to any undue compressio'rn 'Ihe rebound of the spring 3 is controlled by the passage of the fluid through the valve 20, the spring 24 being adjusted to secure the desired action or result.

iMy improved shock absorber is comparatively simple and economical to produce. It

may be easily and quickly installed and is 7 very efiicienhits action being varied according to the intensity of the rebound.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent. is:

l. The combination in a structure of the class described comprising a running gear member, a body member and asupporting spring for said body member mounted on said running gear member, of a fluid cylinder mounted on saidbody member and having a transverse partition providing a cylinder at one endand a fluid chamber, said partition having a central cylinder discharge port therein, a piston, an outwardly opening valve for said discharge port provided with an inwardly projectingstem', a crossinem-f ber disposed'within said cylinder and constituting a support for said stem, a seating spring for said valve, "meansfor adjusting the tension of said seating spring, a'passage connecting said discharge chamber with said cylinderand open to the inner end'of the c *linder beyond the stroke of thfpiston and aving a port provided with a return check cylinder, inlet valve connecting said passage with said cylinder at a point beyond the" out stroke of the piston, a rock shaft disposed transversely of the cylinder at the inner end thereof, an arm on said rock shaft within the cylinder, a'connecting rod connecting said" piston to such arm, an"actuat ing arm on said rock"shaft,and a link con-.

[necting said actuating'arm to said running in, a *pistoman outwardly-opening valve for; said discharge port provided with an ingear member. 2; The combination in a structure of the class described of a fluid-cylinder mounted on said body member and havin' a transverse partition providing a cylin er at one end and a fluid chamber, said partition'having vaoentral cylinderfdischarge port therewardly projecting stem, a cross member disposed within said cylinder and constituting a support for said stem, a seatingspring for c said valve, means for adjusting the tension of said seating spring, a passage connectingsaid discharge chamber with said cylinder and open-to the inner end of the cylinder beyond the strokeof'the piston and having a'port provided with a return checkrcylinderinlet' valve connecting saidpassage with said cylinder at a point beyond the out I within the cylinder.

stroke of the pidon, a rock shaft disposed transversely of the cylinder at the inner rock shaft end thereof, and an arm on said said The combination in a structure of the clsss'described comprising a running gear member, a body member and a supporting spring for said body member mounted on said running gear member, of a fluid cylini'ng a transverse partition providing a cylinder at one end anda fluid chamber, said partition having a central cylinder discharge port therein, a piston, an outwardly opening valve "for said discharge port, a seating sprin for said "valve, a passage connecting and open to the inner end of the cylinder beyond the stroke of the piston and having a port provided witha: return chec'k cylinder inlet valve connecting said passage with said cylinder at a pointbeyond the out stroke of the piston, a rock shart dieposed transversely of the-cylinder at the inner end discharge chamber with saidcylinder der mounted on said body member and hav- 7 thereof, an arm "on said rock shaft within the cylinder, a connecting nod eonnecting said iston 'to such arm, an actuating arm on said rock shaft, and a link connecting said actuating arm to said running members L f f 4. The combination class described, of a fluid 7 cylinder mounted on said body n emberand havin a trans versepartition providing a cylin or at one end and han chamber, said partition ha in a mriioture or the ing acentral cylinder discharge port therein, a piston, an outwardly opening valve for said discharge port, a seating spring for said valve, a passage connecting said dis charge chamber with said cylinder and opento theinner enlist. the cylinder beyond the stroke ofthe pisto'nand having a port provided with a return check cylinder inlet valve connecting said passage with said cylinder at a point beyond the out stroke of thepiston, a rock'shaft disposed trans 05 on said rock'shaftwith have hereunto 

